Cristiano Ronaldo is fit enough to start for Juventus in Wednesday's Champions League quarter-final first leg against Ajax. Head coach Massimiliano Allegri has confirmed the 34-year-old has recovered sufficiently from a thigh injury sustained while on Portugal duty last month. Ronaldo has not played for the Serie A leaders since scoring a hat-trick in the 3-0 last-16 second-leg win over Atletico Madrid on March 12. As a result, he's missed out on wins over Genoa, Empoli, Cagliari and AC Milan as Juventus have moved within a step of claiming the Serie A crown. Ronaldo has made scored 19 goals in 26 league matches for the Serie A leaders while also adding four goals in seven Champions League appearances for the club. "Cristiano has trained well with the team. He will start tomorrow night," Allegri told a news conference on Tuesday.